JPS5497664A - Sheet extrusion - Google Patents

Sheet extrusion

Info

Publication number
JPS5497664A
JPS5497664A JP471478A JP471478A JPS5497664A JP S5497664 A JPS5497664 A JP S5497664A JP 471478 A JP471478 A JP 471478A JP 471478 A JP471478 A JP 471478A JP S5497664 A JPS5497664 A JP S5497664A
Authority
JP
Japan
Prior art keywords
film
rolls
gases
sheet
vacuum ports
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP471478A
Other languages
Japanese (ja)
Inventor
Takao Araki
Kunihiko Otaki
Fukuo Arakawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Asahi Chemical Industry Co Ltd
Original Assignee
Asahi Chemical Industry Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Asahi Chemical Industry Co Ltd filed Critical Asahi Chemical Industry Co Ltd
Priority to JP471478A priority Critical patent/JPS5497664A/en
Publication of JPS5497664A publication Critical patent/JPS5497664A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/35—Extrusion nozzles or dies with rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/07—Flat, e.g. panels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/07—Flat, e.g. panels
    • B29C48/08—Flat, e.g. panels flexible, e.g. films

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

PURPOSE:To extrude a plastic sheet or a film having smoothness free from an optical strain and a beautiful surface with glazing rolls, by evacuating gases from a specific section equipped with head openings. CONSTITUTION:A molten plastic is extruded from the head of the die 4 of the extruder 1 to form a sheet or a film, and gases or mists of low-molecular substances are purged through the vacuum ports 7 and 7' equipped between the die 4 and the roll 5 by suction or by blowing air. The sheet or film not cooled sufficiently yet is glazed by the rolls 5, 5', and, 5'' under cooling. In this stage, the remaining low-molecular substances are removed from the system by the vacuum port 7 and 7', and, if necessary, by the additional vacuum port 7'' equipped. The vacuum ports 7, 7, and 7'' are equipped within a distance of the radius R of the rolls 5, 5', and 5'' from the roll surfaces so that the purging speed of the gases at the head openings of the vacuum ports is maintained at 0.1-30 m/sec.
JP471478A 1978-01-19 1978-01-19 Sheet extrusion Pending JPS5497664A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP471478A JPS5497664A (en) 1978-01-19 1978-01-19 Sheet extrusion

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP471478A JPS5497664A (en) 1978-01-19 1978-01-19 Sheet extrusion

Publications (1)

Publication Number Publication Date
JPS5497664A true JPS5497664A (en) 1979-08-01

Family

ID=11591544

Family Applications (1)

Application Number Title Priority Date Filing Date
JP471478A Pending JPS5497664A (en) 1978-01-19 1978-01-19 Sheet extrusion

Country Status (1)

Country Link
JP (1) JPS5497664A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0210165A1 (en) * 1985-02-01 1987-02-04 POPOW, Anatoliy Continuous molding apparatus and method
JP2008073870A (en) * 2006-09-19 2008-04-03 Konica Minolta Opto Inc Optical film molding apparatus and optical film manufacturing method
JP2010064327A (en) * 2008-09-10 2010-03-25 Fujifilm Corp Film, method for manufacturing the same, polarizing plate, and liquid crystal display

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5125379A (en) * 1974-08-23 1976-03-01 Kawase Gijutsu Kenkyusho Kk

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5125379A (en) * 1974-08-23 1976-03-01 Kawase Gijutsu Kenkyusho Kk

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0210165A1 (en) * 1985-02-01 1987-02-04 POPOW, Anatoliy Continuous molding apparatus and method
JP2008073870A (en) * 2006-09-19 2008-04-03 Konica Minolta Opto Inc Optical film molding apparatus and optical film manufacturing method
JP2010064327A (en) * 2008-09-10 2010-03-25 Fujifilm Corp Film, method for manufacturing the same, polarizing plate, and liquid crystal display

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